Power system

Abstract

The present invention provides a power system capable of supplying primary adjustment power when performing power control using induced command values. [Solution] The power system S1 comprises a plurality of power control devices B1 that control the output of connected power equipment X, and a processing device A1. The connection point power includes primary adjustment power and system power. The processing device A1 includes a difference calculation unit 131 that calculates a target difference between a target value of system power and a value of connection point power. Each of the plurality of power control devices B1 includes an adjustment width calculation unit 22 that calculates an adjustment width for supplying primary adjustment power, an equipment target setting unit 25 that sets an equipment target for the connected power equipment X, and a power control unit 27 that controls the connected power equipment X. The equipment target setting unit 25 includes a command value calculation unit 253 that calculates an induced command value considering the adjustment width, and an equipment target calculation unit 256 that calculates an equipment target by adding the adjustment width to the calculation result based on the induced command value.

Claims

1. A power system that can supply primary adjustment power to a power grid while controlling the connection point power at the connection point with the power grid, Multiple power control devices connected to the power system via the aforementioned connection point and performing output control of connected power equipment, A processing unit capable of communicating with each of the aforementioned plurality of power control devices, Equipped with, The connection point power includes the primary regulating power and the system power, which is the output power of the power system excluding the primary regulating power. The processing device includes a difference calculation unit that calculates the difference between the overall target, which is the target value of the system power, and the value of the connection point power as the target difference. Each of the plurality of power control devices includes: an adjustment width calculation unit that calculates an end adjustment width which is a power value to be adjusted for supplying the primary adjustment power; an equipment target setting unit that sets an equipment target which is a target value for the output power of the connected power device using the end adjustment width and the target difference; and a power control unit that controls the power device so that the equipment power which is the output power of the connected power device becomes the equipment target. The equipment target setting unit includes a command value calculation unit that calculates an induction command value from the target difference, taking into account the self-end adjustment range; a reference value calculation unit that calculates an output reference value for making the system power the overall target, using an equalized command value obtained by equalizing the induction command values ​​calculated by each of the plurality of power control devices; and an equipment target calculation unit that calculates the equipment target by adding the self-end adjustment range to the output reference value.

2. In each of the plurality of power control devices, the equipment target setting unit includes a leveling value calculation unit that communicates with at least one of the other power control devices to calculate the leveling command value. The leveling value calculation unit generates an internal value based on the induction command value, and performs a calculation process to generate a new internal value using the generated internal value and the internal value received from at least one of the other power control devices. The power system according to claim 1, wherein the internal value converges to the leveling command value as the calculation process is repeated.

3. The processing device includes a leveling value calculation unit that communicates with each of the plurality of power control devices to calculate the leveling command value, The power system according to claim 1, wherein the leveling value calculation unit receives the induction command values ​​from each of the plurality of power control devices and calculates the average value of the received induction command values ​​as the leveling command value.

4. A power system that can supply primary adjustment power to a power grid while controlling the connection point power at the connection point with the power grid, Multiple power control devices connected to the power system via the aforementioned connection point and performing output control of connected power equipment, A processing unit capable of communicating with each of the aforementioned plurality of power control devices, Equipped with, The connection point power includes the primary regulating power and the system power, which is the output power of the power system excluding the primary regulating power. The processing device includes a difference calculation unit that calculates the difference between the overall target, which is the target value of the system power, and the value of the connection point power as the target difference. Each of the plurality of power control devices includes: an adjustment width calculation unit that calculates an end adjustment width which is a power value to be adjusted for supplying the primary adjustment power; an equipment target setting unit that sets an equipment target which is a target value for the output power of the connected power device using the end adjustment width and the target difference; a power control unit that controls the power device so that the equipment power which is the output power of the connected power device becomes the equipment target; and a measurement unit that measures the equipment power. The equipment target setting unit includes a command value calculation unit that calculates an induction command value from the target difference, taking into account the self-end adjustment range; a reference value calculation unit that calculates an output reference value for making the system power the overall target based on the induction command value; a correction value calculation unit that calculates the deviation of the measured value of the equipment power from the estimated value of the equipment target as a reference correction value, using an estimated value of the equipment target estimated from the sum of the equipment power measured by each of the plurality of power control devices; and an equipment target calculation unit that corrects the output reference value with the reference correction value and calculates the equipment target by taking into account the self-end adjustment range in addition to the correction result.

5. The power system according to claim 4, wherein each of the plurality of power control devices includes an estimated target calculation unit that calculates an estimated value of the equipment target.

6. The power system according to claim 4, wherein the processing device includes an estimated target calculation unit that calculates an estimated value of the equipment target for each of the plurality of power control devices.

7. The power system according to claim 5 or 6, wherein the estimated target calculation unit calculates the average value of the measured values ​​of the equipment power of each of the plurality of power control devices as an estimated value of the equipment target.

8. The plurality of power control devices include a battery control device to which a battery is connected as a power device, The power system according to any one of claims 1 to 6, wherein the reference value calculation unit of the battery control device uses a weighting coefficient corresponding to the charge level of the battery in calculating the output reference value.

9. The power system according to any one of claims 1 to 6, wherein each of the plurality of power control devices includes a timing synchronization unit that synchronizes the timing of outputting the self-end adjustment range from the adjustment range calculation unit to the equipment target setting unit.

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